Four way respiratory valve



FIG. 1 is a perspective view of a four way respiratory valve showing ournew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is an another left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a bottom plan view thereof.

The side elevational view taken perpendicular to a fourth facepositioned directly to the right of the third face is a mirror image ofFIG. 5.

The ornamental design for a four way respiratory valve, as shown anddescribed.